Liquid ejecting head module and liquid ejecting apparatus

Abstract

A liquid ejection head module comprising: first and second head units disposed in a first direction, each of the first and second head units having first and second rows of liquid ejecting heads that comprises a plurality of nozzles disposed in the first direction, the first and second rows of liquid ejecting heads being disposed in a second direction crossing the first direction; a first concavity and convexity on edge of the first head unit; a second convexity and concavity on edge of the second head unit, the edge of the second head unit facing to the edge of the first head unit, at least one of the liquid ejecting heads being disposed at each of the first and second convexities, wherein the first concavity and convexity and the second convexity and concavity are disposed in mating relation to one another.

What is claimed is: 
     
       1. A liquid ejection head module comprising:
 first and second head units disposed in a first direction, each of the first and second head units having first and second rows of liquid ejecting heads that comprises a plurality of nozzles disposed in the first direction, the first and second rows of liquid ejecting heads being disposed in a second direction crossing the first direction; 
 a first concavity and convexity on edge of the first head unit; 
 a second convexity and concavity on edge of the second head unit, the edge of the second head unit facing to the edge of the first head unit, at least one of the liquid ejecting heads being disposed at each of the first and second convexities, 
 wherein the first concavity and convexity and the second convexity and concavity are disposed in mating relation to one another, and the at least one of the liquid ejecting heads disposed at each of the first and second convexities are disposed in overlapping relation to one another in the second direction and wherein the first and second row of liquid ejecting heads of the first and second head units are aligned in a straight line in the first direction when the first concavity and convexity and the second convexity and concavity are disposed in the mating relation. 
 
     
     
       2. The liquid ejecting head module according to  claim 1 , further comprising:
 a plurality of connectors disposed on each head unit, each connector being electrically connected to each liquid ejecting head and an external wiring, each connector having a connecting port, 
 wherein each connector is disposed so that the connecting port connected to the external wiring is open at a side opposite from a liquid ejecting side where each nozzle aperture of each liquid ejecting head is open, and each connector is disposed on the exterior of each row of the plurality of liquid ejecting heads in the second direction in which the plurality liquid ejecting heads are disposed in side by side parallel rows. 
 
     
     
       3. The liquid ejecting head module according to  claim 2 ,
 wherein a plurality of rows, where the plurality of the head units are disposed side by side in the first direction, are disposed side by side in the second direction so as to be adjacent to one another in the second direction, and the plurality of connectors located among the plurality of rows of the head units are disposed so that first one of the plurality of connectors of a first head units row and second one of the plurality of connectors of a second row are spaced apart from each other in the first direction. 
 
     
     
       4. A liquid ejecting apparatus comprising the liquid ejecting head module according to  claim 3 . 
     
     
       5. The liquid ejecting head module according to  claim 2 ,
 wherein a thin wall portion is formed at a boundary in each holder between a region where each connector is disposed and a side where each nozzle aperture is open, and the thin wall portion has a wall thickness smaller than those of another regions. 
 
     
     
       6. A liquid ejecting apparatus comprising the liquid ejecting head module according to  claim 5 . 
     
     
       7. The liquid ejecting head module according to  claim 2 ,
 wherein a space is formed between each holder and a substrate on which each connector is disposed. 
 
     
     
       8. A liquid ejecting apparatus comprising the liquid ejecting head module according to  claim 7 . 
     
     
       9. A liquid ejecting apparatus comprising the liquid ejecting head module according to  claim 2 . 
     
     
       10. A liquid ejecting apparatus comprising the liquid ejecting head module according to  claim 1 .